Help!

Jordynn

I stopped taking my birth control pills a couple weeks ago. I stopped them during the “period pill week” after I had started menstruating there’s was only 3 pills left, well last night hubby and I had sex and I woke up today with some spotting. What could this be? I’m in my fertile week today and I don’t ovulate until Wednesday and my period won’t be for another 3 weeks.